﻿using MediatR;
using Microsoft.EntityFrameworkCore;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using SlaughterItem.Common.Domains.Manages;
using SlaughterItem.Common.Domains.Saleser;
using SlaughterItem.Common.Dtos;
using SlaughterItem.Common.Infrastructures.Interfaces;
using SlaughterItem.Enum;
using System.Globalization;

namespace SlaughterItem.API.Application.Commands.Week03.leo
{
    public class SaleDetaisImportHandler : IRequestHandler<SaleDetaisImportCommend, Result>
    {
        //销售明细表
        private readonly IBaseRepository<SalesDetails> SalesDetails;
        //客户名称表
        private readonly IBaseRepository<Clients> Clients;

        //构造函数
        public SaleDetaisImportHandler(IBaseRepository<SalesDetails> SalesDetails, IBaseRepository<Clients> Clients)
        {
            this.SalesDetails = SalesDetails;
            this.Clients = Clients;
        }

        public async Task<Result> Handle(SaleDetaisImportCommend request, CancellationToken cancellationToken)
        {
            var result = new Result() { Code = (int)CommonErrorCode.Search };
            try
            {
                //获取文件扩展名 判断上传的文件类型是否正确
                var ext = Path.GetExtension(request.file.FileName);
                if (ext == ".xls" || ext == ".xlsx")
                {

                }
                else
                {
                    result.Msg = "您上传的文件类型不正确";
                    return result;
                }

                using (MemoryStream ms = new MemoryStream())
                {
                    request.file.CopyTo(ms);
                    ms.Position = 0;

                    //根据文件扩展名创建对应的工作簿对象(HSSFWorkbook用于.xls，XSSFWorkbook用于.xlsx)
                    //获取工作簿
                    IWorkbook wb = null;
                    if (ext == ".xls")//创建97-2003
                    {
                        wb = new HSSFWorkbook(ms);
                    }
                    else//创建2007及以上版本
                    {
                        wb = new XSSFWorkbook(ms);
                    }

                    //获取sheet 获取工作簿中的第一个工作表
                    ISheet sheet = wb.GetSheetAt(0);

                    int totalRows = sheet.LastRowNum;//总行数
                    int totalCells = sheet.GetRow(0).LastCellNum;//总列数

                    // 创建一个用于存储解析后的数据的列表
                    var farrowingsList = new List<SalesDetails>();

                    //循环总行数 开头必须是1 不然从表头开始
                    //遍历工作表的每一行（从第二行开始，因为第一行通常是表头）
                    for (int i = 1; i <= totalRows; i++)
                    {
                        //获取当前行
                        IRow row = sheet.GetRow(i);

                        //这个类必须写到循环里边 不然你批量添加只能添加一行
                        var dto = new SalesDetails();// 在循环内创建新的对象实例

                        //下标从0开始 导入时 外键需进行判断 客户不知道你是外键 只会输入文字 需要在后台判断
                        var earnumber = row.GetCell(0).ToString();
                        var basic = await SalesDetails.GetAll().Where(z => z.SalesDetailsOrderNum == earnumber).FirstOrDefaultAsync();
                        dto.SalesDetailsId = basic.SalesDetailsId;

                        //日期转换
                        //日期在excel表中必须是年月日格式 但不能加时分秒 (注意!!!!)
                        string inputDate = row.GetCell(1).ToString();
                        string[] multipleFormats = { "dd-M月-yyyy", "yyyy-M-dd" };
                        DateTime parsedDate;
                        foreach (var format in multipleFormats)
                        {
                            if (DateTime.TryParseExact(inputDate, new[] { format }, CultureInfo.InvariantCulture, DateTimeStyles.None, out parsedDate))
                            {
                                dto.SalesDetailsDate = Convert.ToDateTime(parsedDate.ToString("yyyy-MM-dd"));
                                break;//成功解析后跳出循环
                            }
                        }

                        dto.CustomerId = Convert.ToInt32(row.GetCell(2).ToString());
                        dto.SalesDetailsOrderNumber = row.GetCell(6).ToString();
                        dto.SalesDetailsOrderNum = row.GetCell(7).ToString();
                        dto.SalesDetailsState =Convert.ToBoolean( row.GetCell(11).ToString() == "已发货" ? 1 : 0);

                        //添加到数据集合中
                        farrowingsList.Add(dto);
                    }
                    //跳出循环后 使用AddRange进行批量添加
                    var res = SalesDetails.AddRange(farrowingsList);
                    //判断
                    if (res > 0)
                    {
                        result.Msg = "导入成功";
                    }
                    else
                    {
                        result.Msg = "导入失败";
                    }

                }
            }
            catch (Exception ex)
            {
                result.Msg = "导入异常" + ex.Message;
            }
            return result;
        }
    }
}
